/*
 * chcount.c - 使用逻辑与去处符
 */

#include <stdio.h>
#define PERIOD '.'

int main(void)
{
    int ch;
    int charcount = 0;
    while ((ch = getchar()) != PERIOD) {
        if (ch != '"' && ch != '\'') {
            charcount ++;
        }
    }
    printf("There are %d non-quote characters.\n", charcount);
    return 0;
}
